package com.lagou.mr.nc;

import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;

import java.io.IOException;

public class NumberSortMapper extends Mapper<LongWritable, Text, IntWritable, NullWritable> {

    IntWritable resultKey = new IntWritable();

    @Override
    protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
        int num = Integer.parseInt(value.toString());
        resultKey.set(num);
        context.write(resultKey, NullWritable.get());
    }
}
